Make cdf_file_annotation and cdf_entity_matching self-contained

[Aashutosh-cognite]

Depends on PR #274
Both contextualization modules previously relied on an external shared space (springfield_functions) for storing CDF Function code nodes — a dependency on cdf_foundation which is being removed from the Foundation DP.

This PR makes each module fully self-contained by:

• Adding a fn.Space.yaml to each module that creates its own dedicated function space at deploy time.
• Updating the functionSpace default in default.config.yaml to a module-scoped name (sp_file_annotation_fn / sp_entity_matching_fn) instead of the shared springfield_functions.
• Updating PRD.md to reflect the updated module status and revised resource counts.

No functional changes — purely a self-containment fix so either module can be deployed independently without any other module having to pre-create the function space.

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[Aashutosh-cognite]

/gemini review

[gemini-code-assist]

Code Review

This pull request aims to make the cdf_file_annotation and cdf_entity_matching modules self-contained by adding dedicated function spaces and updating their configurations. Feedback includes renaming the data_modeling directories to data_models to align with the repository style guide and correcting several inaccuracies and summation errors in the PRD.md resource summary table. Furthermore, the missing DataSet.yaml and Group.yaml definitions should be included to fulfill the self-containment goal.